This campfire session elucidates participants views on "stopping rules" - the conditions under which people might consider downscaling or ceasing research into CE technologies, and "starting rules" - conditions under which people may advocate a dramatic increase in research, or the commencement of research at the next level of scale (e.g. a move to outdoor experiments). Some participants will be invited present some initial thoughts in order to kick-start a group discussion. All participants will be invited to reflect on others' views and refine their own in the course of the discussion.

Clare Heyward is a Leverhulme Early Career Fellow at the University of Warwick, working on the project Global Justice and Geoengineering. Clare is interested in issues of global distributive justice and intergenerational justice, especially those connected to climate change. Before joining the University of Warwick, she was James Martin Research Fellow on the Oxford Geoengineering Programme, where she researched ethics and governance issues raised by the prospect of using geoengineering technologies as a response to climate change.

David Keith has worked near the interface between climate science, energy technology, and public policy for twenty-five years. He took first prize in Canada's national physics prize exam, won MIT's prize for excellence in experimental physics, and was one of TIME magazine's Heroes of the Environment. David is Professor of Applied Physics in Harvard’s School of Engineering and Applied Sciences and Professor of Public Policy in the Harvard Kennedy School, and founder at Carbon Engineering, a company developing technology to capture of CO2 from ambient air to make carbon-neutral hydrocarbon fuels. Best known for work on the science, technology, and public policy of solar geoengineering, David is leading the development of an interfaculty research initiative on solar geoengineering at Harvard. David’s work has ranged from the climatic impacts of large-scale wind power to an early critique of the prospects for hydrogen fuel. David’s hardware engineering projects include the first interferometer for atoms, a high-accuracy infrared spectrometer for NASA's ER-2, and currently, development of CO2 capture pilot plants for Carbon Engineering. David teaches courses on Science and Technology Policy and on Energy and Environmental Systems where he has reached students worldwide with an online edX course. He has writing for the public with A case for climate engineering from MIT Press. Based in Cambridge, David spends about a third of his time in Canmore Alberta.

Anjali Viswamohanan is an analyst at the Council on Energy, Environment and Water, where she works extensively on regulatory and finance issues in the energy space. Her broader role is centred around assessing the feasibility of energy transition scenarios as a response to the perpetually evolving technology mix. She is keen on developing frameworks around governance issues, specifically to advance the development of technology that deals with the mounting climate change-related concerns of the underdeveloped and developing world.
A lawyer by training, she has in her previous role, worked extensively on energy projects and public-private partnerships (PPPs) in the Indian infrastructure space.

Dr. Rodel D. Lasco has more than 35 years of experience in natural resources and environmental research, conservation, education and development at the national and international level. His work has focused on issues related to natural resources conservation, climate change and land degradation. Since 1999, he has served as lead author of the IPCC, the 2007 co-winner of the Nobel Peace Prize. He is also a member of the National Academy of Science and Technology (NAST) in the Philippines.
He is the Philippines Coordinator of the World Agroforestry Centre (ICRAF) since April 2004, a center devoted to promoting “tree on farms”. Concurrently, he is the Scientific Director of the OML Center, a private foundation whose mission is to promote research on climate adaptation and disasters risk reduction. He is an affiliate professor at the University of the Philippines at Los Banos.
He is a multi-awarded scientist with over 80 technical publications in national and international journals dealing with the various aspects of natural resources conservation and environmental management. He pioneered research in the Philippines on climate change adaptation in the natural resources sector, the role of tropical forests in climate change/global warming, and the policy implications of the Kyoto Protocol. He also spearheaded the Philippines sub-global component of the global Millennium Ecosystems Assessment which is designed to assess the role of ecosystems and their biodiversity in providing services for human well-being.

Dr. Nadine Mengis is a PostDoc in the department of Geography at the Concordia University, Montreal, Canada. While she worked on single Climate Engineering scenarios, and in particular the Climate Engineering assessment challenge during her PhD, her main research interest is uncertainty assessment within Earth system models. At her new position she is hence working on assessing the uncertainty within carbon budget estimates for ambitious climate target such as the 1.5 °C temperature target.